.TH QRENCODE 1 "Aug. 28, 2020" "qrencode 4.1.1"
.SH NAME
qrencode \- Encode input data in a QR Code and save as a PNG or EPS image.
.SH SYNOPSIS
.B "qrencode"
[-o FILENAME]
[OPTION]...
[STRING]

.SH DESCRIPTION
Libqrencode is a library for encoding data in a QR Code symbol, a kind of 2D
symbology that can be scanned by handy terminals such as a mobile phone with
CCD. The capacity of QR Code is up to 7000 digits or 4000 characters, and has
high robustness.

Qrencode is a utility software using libqrencode to encode string data in
a QR Code and save as a PNG or EPS image.

.SH OPTIONS
.TP
.B \-h, \-\-help
display help message.
.TP
.B \-o FILENAME, \-\-output=FILENAME
write image to FILENAME. If '\-' is specified, the result will be output to standard output. If \-S is given, structured symbols are written to FILENAME-01.png, FILENAME-02.png, ... (suffix is removed from FILENAME, if specified)
.TP
.B \-r FILENAME, \-\-read\-from=FILENAME
read input data from FILENAME.
.TP
.B \-s NUMBER, \-\-size=NUMBER
specify the size of dot (pixel). (default=3)
.TP
.B \-l {LMQH}, \-\-level={LMQH}
specify error correction level from L (lowest) to H (highest). (default=L)
.TP
.B \-v NUMBER, \-\-symversion=NUMBER
specify the minimum version of the symbol. See SYMBOL VERSIONS for more information. (default=auto)
.TP
.B \-m NUMBER, \-\-margin=NUMBER
specify the width of margin. (default=4)
.TP
.B \-d NUMBER, \-\-dpi=NUMBER
specify the DPI of the generated PNG. (default=72)
.TP
.PD 0
.B \-t {PNG,PNG32,EPS,SVG,XPM,ANSI,ANSI256,ASCII,ASCIIi,UTF8,UTF8i,ANSIUTF8,ANSIUTF8i,ANSI256UTF8}
.TP
.PD
.B \-\-type={PNG,PNG32,EPS,SVG,XPM,ANSI,ANSI256,ASCII,ASCIIi,UTF8,UTF8i,ANSIUTF8,ANSIUTF8i,ANSI256UTF8}
specify the type of the generated image. (default=PNG)
.TP
.B \-S, \-\-structured
make structured symbols. Version number must be specified with '-v'.
.TP
.B \-k, \-\-kanji
assume that the input text contains kanji (shift-jis).
.TP
.B \-c, \-\-casesensitive
encode lower-case alphabet characters in 8-bit mode. (default)
.TP
.B \-i, \-\-ignorecase
ignore case distinctions and use only upper-case characters.
.TP
.B \-8, \-\-8bit
encode entire data in 8-bit mode. \-k, \-c and \-i will be ignored.
.TP
.B \-M, \-\-micro
encode in a Micro QR Code. See MICRO QR CODE for more information.
.TP
.B \-\-rle
enable run-length encoding for SVG.
.TP
.B \-\-svg-path
use single path to draw modules for SVG.
.TP
.B \-\-inline
only useful for SVG output, generates an SVG without the XML tag.
.TP
.PD 0
.B \-\-foreground=RRGGBB[AA]
.TP
.PD
.B \-\-background=RRGGBB[AA]
specify foreground/background color in hexadecimal notation.
6-digit (RGB) or 8-digit (RGBA) form are supported.
Color output support available only in PNG, EPS and SVG.
.TP
.B \-\-strict\-version
disable automatic version number adjustment. If the input data is
too large for the specified version, the program exits with the
code of 1.
.TP
.B \-V, \-\-version
display the version number and copyrights of the qrencode.
.TP
.B \-\-verbose
display verbose information to stderr.
.TP
.B [STRING]
input data. If it is not specified, data will be taken from standard input.

.SH SYMBOL VERSIONS
The symbol versions of QR Code range from Version 1 to Version 40.
Each version has a different module configuration or number of modules,
ranging from Version 1 (21 x 21 modules) up to Version 40 (177 x 177 modules).
Each higher version number comprises 4 additional modules per side by default.
See http://www.qrcode.com/en/about/version.html for a detailed version list.

.SH MICRO QR CODE
With Micro QR Code, You can embed data in a smaller area than with QR Code,
but the data capacity is strongly limited. The symbol versions range from
Version 1 to 4.

.SH EXAMPLES
.TP
.B qrencode \-l L \-v 1 \-o output.png 'Hello, world!'
encode into a symbol version 1, level L.
.TP
.B qrencode \-iSv 1 \-\-output=output.png
read standard input and encode it into a structured-appended symbols in
case-insensitive mode.
.TP
.B qrencode \-S \-v 40 \-l L \-r bigfile.txt \-o output.png
read input data from bigfile.txt and encode into a symbol version 40, level L.

.SH AUTHOR
Written by Kentaro Fukuchi.

.SH RESOURCES
.TP
Main Web Site: https://fukuchi.org/works/qrencode/
.TP
Source code repository: https://github.com/fukuchi/libqrencode/

.SH COPYRIGHT
Copyright (C) 2006-2018 Kentaro Fukuchi.
